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zimovet [89]
3 years ago
9

PLEASE HELP!!! 15 POINTS! The histogram shows the number of books read by book club members during the summer.

Mathematics
2 answers:
ella [17]3 years ago
4 0
A. 5/12 because 5 members read less than 6 books and there are 12 members in total
natka813 [3]3 years ago
3 0

Hello, I will try to make this as easy to understand as possible.

First, we see that there are 12 people in the Book Club, but as we see in the graph...

There are 2 persons that have read 0-2 books.

There are 3 persons that have read 3-5 books.

There are 5 persons that have read 6-9 books.

There are 2 persons that have read 9-11 books.

Since the question asks what fraction of the members read fewer than six books, we know the range would have to be between 0-6.

So the ones that are valid in this case are the 0-2 and 3-5 books, and we know that is 2+3, which equals 5, now, we just divide between 12.

The answer would be 5/12

Hope this helped! c:

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<h3>What are the hypotheses tested?</h3>

At the null hypotheses, it i tested if the mean difference remains the same, that is:

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At the alternative hypotheses, it is tested if it has decreased, hence:

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The test statistic is given by:

t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}

The parameters are:

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The parameters are given as follows:

\overline{x} = -1.75, s = 7.12, n = 35.

Hence the test statistic is given by:

t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{-1.75 - 0}{\frac{7.12}{\sqrt{35}}}

More can be learned about the t-distribution at brainly.com/question/16162795

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